// 16 x 16
const unsigned char ionizing_radiation_symbol_16x16[] PROGMEM = {
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf3, 0xcf, 0xf3, 0xcf, 0xe1, 0x87,
  0xe1, 0x87, 0xe2, 0x47, 0xfe, 0x7f, 0xfe, 0x7f, 0xfc, 0x3f, 0xfc, 0x3f,
  0xf8, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};